Transmission tower



FIG. 1 is a perspective view of a transmission tower, showing my new design;

FIG. 2 is a front elevational view, the rear being a mirror image thereof;

FIG. 3 is a side elevational view, the opposite side being a mirror image thereof; and,

FIG. 4 is an enlarged top plan view, the bottom being plain an unadorned. 

The ornamental design for a transmission tower, as shown and described. 